Commitments and Contingencies - Additional Information (Detail) a in Thousands, $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($) a agreement integer
Commitments and Contingencies Disclosure [Abstract]
Number of firm transportation contracts | agreement	2
Number of firm pipeline transportation contracts	1
Minimum volume commitment	1
Number of reimbursement obligations	2
Number of other commitments	2
Number of Drilling Commitments	1
Number of Wells Due by July 2022	2
Number of Wells Due by July 2023	3
Acreage to be Assigned if Drilling Commitment Not Met | a	13
Drilling Commitment Due 2022 | $	$ 10.2
Drilling Commitment Due 2023 | $	$ 15.3